EXAMESINSIGHT

Instructions: Answer all 26 questions. Each question carries 1 mark. Time allotted: 26 minutes. Click "Submit" when finished.

226. 1 horsepower equals:

(a) 746 J (b) 74.6 J/s (c) 746 W (d) 746 kW

227. Which of the following is NOT a unit of power?

(a) Kilowatt hour (b) Watt (c) Joule/second (d) Horsepower

228. How is power interpreted?

(a) Work done in energy transfer (b) Force charged to increase load (c) Working rate or energy transfer rate (d) Work done in a minute

229. What is working rate or energy transfer rate?

(a) Power (b) Work done (c) Impulse (d) Force

230. Rate of doing work is called?

(a) Energy (b) Velocity (c) Power (d) Force

231. Rate of doing work is called?

(a) Energy (b) Power (c) Pressure (d) Force

232. If a man do 'W' work in 't' time, then his power 'P' will be-

(a) t-W (b) t×W (c) W/t (d) t/W

233. What is the formula for power–

(a) Work/Time (b) Time/Area (c) Work × Time (d) Time/Work

234. If an agent doing 'W' works in time 't', then his power will be –

(a) W×t (b) W+t (c) t/W (d) W/t

235. Formula of power is -

(a) Momentum/time (b) Work/time (c) Speed/time (d) Displacement/time

236. Which of the following physical quantity measures the rate of work done?

(a) Power (b) Momentum (c) Force (d) Energy

237. Power= W/T, what is the meaning of W ?

(a) Power (b) Weight (c) Watt (d) Work done

238. Which of the following physical quantity measure the rate of work ?

(a) Force (b) Velocity (c) Energy (d) Power

239. Mohan having a mass of 40 kg. He climbs 50 steps of a staircase in 10s. If the height of each step is 15cm then what is his power? (g = 10 m/s²)

(a) 200W (b) 400W (c) 300W (d) 100W

240. If a boy covers a distance of 20 meters with 600 Newton force in 4 minutes, then the amount of power consumed by the boy is?

(a) 50watt (b) 100watt (c) 80watt (d) 25watt

241. A boy of 50 kg mass climbs 40 stairs in 9 seconds. If the height of each stair is 15cm, then find his power. (g= 10ms⁻²)

(a) 333.33W (b) 333.34J (c) 333.34ms (d) 387.5W

242. Name the physical quantity that is equal to the product of force and velocity.

(a) Work (b) Energy (c) Power (d) Acceleration

243. A 40 kg girl quickly climbs up the stairs to 5m height in 4 sec, what will be the power developed by her?

244. A boy of 50 kg mass climbs 45 stairs in 10 seconds. If the height of each stair is 16cm then find his power ?

(a) 337.5ms (b) 387.5W (c) 360W (d) 360J

245. The average power is equal to which of the following?

(a) Total time taken/ total used energy (b) Total free energy/total used energy (c) Total time taken/distance travelled (d) Total used energy/total time

246. A boy of 50 kg mass climbs 40 stairs in 10 seconds. If the height of each stair is 15cm, then calculate his power. (g= 10ms⁻²)

(a) 337.5W (b) 300J (c) 300W (d) 300ms

247. A boy of 50 kg mass climbs 45 stairs in 9 seconds. If the height of each stair is 15cm, then calculate his power. (g= 10ms⁻²)

(a) 325W (b) 275W (c) 475W (d) 375W

248. If a girl with a weight of 40 N, climbs on the rope for 20 seconds with the power of 160 watts, then at which height will she reach?

(a) 80 meter (b) 4 meter (c) 8 meter (d) 0.8 meter

249. A boy of 50 kg mass climbs 44 stairs in 10 seconds. If the height of each stair is 15cm then find his power?

(a) 337.5ms (b) 387.5W (c) 330J (d) 330W

250. A boy of 50 kg mass climbs 43 stairs in 10 seconds. If the height of each stair is 15cm then find its power ?

(a) 337.5W (b) 325.5J (c) 322.5W (d) 322.5ms

251. A more powerful engine can do more work in less time like an aeroplane travel more distance as compare to a car in less time. So aeroplane is more powerful than a car. It is an example of which of the following ?

(a) Work performed (b) Power (c) Energy (d) The wave

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TCS NQT Physics - Power Section